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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Find glare sources in a scene or image. |
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* |
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#include "glare.h" |
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|
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#define FEQ(a,b) ((a)-(b)<=FTINY&&(a)-(b)<=FTINY) |
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#define FEQ(a,b) ((a)-(b)<=FTINY&&(b)-(a)<=FTINY) |
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#define VEQ(v1,v2) (FEQ((v1)[0],(v2)[0])&&FEQ((v1)[1],(v2)[1]) \ |
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&&FEQ((v1)[2],(v2)[2])) |
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|
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char *rtargv[32] = {"rtrace", "-h", "-ov", "-fff"}; |
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int rtargc = 4; |
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char *rtargv[64] = {"rtrace", "-h-", "-ov", "-fff", "-ld-", "-i-", "-I-"}; |
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int rtargc = 7; |
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|
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VIEW ourview; /* our view */ |
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VIEW ourview = STDVIEW; /* our view */ |
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VIEW pictview = STDVIEW; /* picture view */ |
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VIEW leftview, rightview; /* leftmost and rightmost views */ |
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|
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int verbose = 0; /* verbose reporting */ |
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char *progname; /* global argv[0] */ |
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|
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double threshold = 0.; /* glare threshold */ |
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|
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int sampdens = SAMPDENS; /* sample density */ |
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ANGLE glarang[180] = {AEND}; /* glare calculation angles */ |
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int nglarangs = 0; |
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double maxtheta; /* maximum angle (in radians) */ |
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int hsize; /* horizontal size */ |
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int hlim; /* central limit of horizontal */ |
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|
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struct illum *indirect; /* array of indirect illuminances */ |
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|
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long npixinvw; /* number of pixels in view */ |
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long npixmiss; /* number of pixels missed */ |
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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static int angcmp(const void *ap1, const void *ap2); |
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static void init(void); |
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static void cleanup(void); |
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static void printsources(void); |
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static void printillum(void); |
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|
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|
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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int combine = 1; |
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int gotview = 0; |
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int rval, i; |
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char *err; |
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progname = argv[0]; |
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/* process options */ |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) { |
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/* expand arguments */ |
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while ((rval = expandarg(&argc, &argv, i)) > 0) |
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; |
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if (rval < 0) { |
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fprintf(stderr, "%s: cannot expand '%s'", |
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argv[0], argv[i]); |
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exit(1); |
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} |
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rval = getviewopt(&ourview, argc-i, argv+i); |
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if (rval >= 0) { |
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i += rval; |
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continue; |
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} |
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switch (argv[i][1]) { |
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case 't': |
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threshold = atof(argv[++i]); |
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break; |
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case 'r': |
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sampdens = atoi(argv[++i])/2; |
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break; |
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case 'v': |
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if (argv[i][2] == '\0') { |
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verbose++; |
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} |
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if (argv[i][2] != 'f') |
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goto userr; |
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rval = viewfile(argv[++i], &ourview, 0, 0); |
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rval = viewfile(argv[++i], &ourview, NULL); |
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if (rval < 0) { |
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fprintf(stderr, |
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"%s: cannot open view file \"%s\"\n", |
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case 'p': |
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picture = argv[++i]; |
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break; |
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case 'c': |
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combine = !combine; |
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break; |
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case 'd': |
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rtargv[rtargc++] = argv[i]; |
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if (argv[i][2] != 'v') |
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rtargv[rtargc++] = argv[++i]; |
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break; |
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case 'l': |
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if (argv[i][2] == 'd') |
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break; |
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/* FALL THROUGH */ |
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case 's': |
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case 'P': |
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rtargv[rtargc++] = argv[i]; |
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rtargv[rtargc++] = argv[++i]; |
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break; |
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case 'w': |
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rtargv[rtargc++] = argv[i]; |
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break; |
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case 'a': |
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rtargv[rtargc++] = argv[i]; |
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if (argv[i][2] == 'v') { |
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} |
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/* get view */ |
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if (picture != NULL) { |
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rval = viewfile(picture, &pictview, 0, 0); |
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rval = viewfile(picture, &pictview, NULL); |
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if (rval < 0) { |
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fprintf(stderr, "%s: cannot open picture file \"%s\"\n", |
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progname, picture); |
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progname); |
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exit(1); |
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} |
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copystruct(&ourview, &pictview); |
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ourview = pictview; |
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} else if (picture != NULL && !VEQ(ourview.vp, pictview.vp)) { |
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fprintf(stderr, "%s: picture must have same viewpoint\n", |
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progname); |
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exit(1); |
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} |
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init(); /* initialize program */ |
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comp_thresh(); /* compute glare threshold */ |
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if (threshold <= FTINY) |
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comp_thresh(); /* compute glare threshold */ |
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analyze(); /* analyze view */ |
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if (combine) |
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absorb_specks(); /* eliminate tiny sources */ |
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cleanup(); /* tidy up */ |
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/* print header */ |
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newheader("RADIANCE", stdout); |
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printargs(argc, argv, stdout); |
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fputs(VIEWSTR, stdout); |
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fprintview(&ourview, stdout); |
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printf("\n\n"); |
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printf("\n"); |
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fputformat("ascii", stdout); |
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printf("\n"); |
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printsources(); /* print glare sources */ |
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printillum(); /* print illuminances */ |
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exit(0); |
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} |
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init() /* initialize global variables */ |
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static int |
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angcmp( /* compare two angles */ |
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const void *ap1, |
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const void *ap2 |
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) |
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{ |
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register int a1, a2; |
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|
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a1 = *(ANGLE *)ap1; |
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a2 = *(ANGLE *)ap2; |
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if (a1 == a2) { |
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fprintf(stderr, "%s: duplicate glare angle (%d)\n", |
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progname, a1); |
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exit(1); |
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} |
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return(a1-a2); |
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} |
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|
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|
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static void |
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init(void) /* initialize global variables */ |
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{ |
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double d; |
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register int i; |
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|
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/* set direction vectors */ |
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for (i = 0; glarang[i] != AEND; i++) |
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; |
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if (i > 0 && glarang[0] <= 0 || glarang[i-1] >= 180) { |
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fprintf(stderr, "%s: glare angles must be between 1 and 179\n", |
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qsort(glarang, i, sizeof(ANGLE), angcmp); |
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if (i > 0 && (glarang[0] <= 0 || glarang[i-1] > 180)) { |
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fprintf(stderr, "%s: glare angles must be between 1 and 180\n", |
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progname); |
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exit(1); |
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} |
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nglarangs = i; |
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/* nglardirs = 2*nglarangs + 1; */ |
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/* vsize = SAMPDENS; */ |
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/* vsize = sampdens - 1; */ |
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if (nglarangs > 0) |
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maxtheta = (PI/180.)*glarang[nglarangs-1]; |
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else |
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maxtheta = 0.0; |
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hlim = SAMPDENS*maxtheta; |
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hsize = SAMPDENS + hlim; |
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if (hsize > (int)(PI*SAMPDENS)) |
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hsize = PI*SAMPDENS; |
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hsize = hlim(0) + sampdens - 1; |
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if (hsize > (int)(PI*sampdens)) |
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hsize = PI*sampdens; |
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indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum)); |
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if (indirect == NULL) |
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memerr("indirect illuminances"); |
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< |
copystruct(&leftview, &ourview); |
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copystruct(&rightview, &ourview); |
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spinvector(leftview.vdir, ourview.vdir, ourview.vup, -maxtheta); |
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spinvector(rightview.vdir, ourview.vdir, ourview.vup, maxtheta); |
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> |
npixinvw = npixmiss = 0L; |
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leftview = ourview; |
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rightview = ourview; |
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spinvector(leftview.vdir, ourview.vdir, ourview.vup, maxtheta); |
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spinvector(rightview.vdir, ourview.vdir, ourview.vup, -maxtheta); |
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setview(&leftview); |
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setview(&rightview); |
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indirect[nglarangs].lcos = |
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indirect[nglarangs].rcos = cos(maxtheta); |
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indirect[nglarangs].lsin = |
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-(indirect[nglarangs].rsin = sin(maxtheta)); |
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> |
indirect[nglarangs].rsin = |
293 |
> |
-(indirect[nglarangs].lsin = sin(maxtheta)); |
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indirect[nglarangs].theta = 0.0; |
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for (i = 0; i < nglarangs; i++) { |
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d = (glarang[nglarangs-1] - glarang[i])*(PI/180.); |
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indirect[nglarangs-i-1].lcos = |
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indirect[nglarangs+i+1].rcos = cos(d); |
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< |
indirect[nglarangs-i-1].lsin = |
300 |
< |
-(indirect[nglarangs+i+1].rsin = sin(d)); |
299 |
> |
indirect[nglarangs+i+1].rsin = |
300 |
> |
-(indirect[nglarangs-i-1].lsin = sin(d)); |
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d = (glarang[nglarangs-1] + glarang[i])*(PI/180.); |
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indirect[nglarangs-i-1].rcos = |
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indirect[nglarangs+i+1].lcos = cos(d); |
304 |
< |
indirect[nglarangs+i+1].lsin = |
305 |
< |
-(indirect[nglarangs-i-1].rsin = sin(d)); |
306 |
< |
indirect[nglarangs-i-1].theta = -(PI/180.)*glarang[i]; |
307 |
< |
indirect[nglarangs+i+1].theta = (PI/180.)*glarang[i]; |
304 |
> |
indirect[nglarangs-i-1].rsin = |
305 |
> |
-(indirect[nglarangs+i+1].lsin = sin(d)); |
306 |
> |
indirect[nglarangs-i-1].theta = (PI/180.)*glarang[i]; |
307 |
> |
indirect[nglarangs+i+1].theta = -(PI/180.)*glarang[i]; |
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} |
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/* open picture */ |
310 |
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if (picture != NULL) { |
326 |
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} |
327 |
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|
328 |
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|
329 |
< |
cleanup() /* close files, wait for children */ |
329 |
> |
static void |
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> |
cleanup(void) /* close files, wait for children */ |
331 |
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{ |
332 |
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if (verbose) |
333 |
< |
fprintf(stderr, "%s: cleaning up...\n", progname); |
333 |
> |
fprintf(stderr, "%s: cleaning up... \n", progname); |
334 |
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if (picture != NULL) |
335 |
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close_pict(); |
336 |
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if (octree != NULL) |
337 |
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done_rtrace(); |
338 |
+ |
if (npixinvw < 100*npixmiss) |
339 |
+ |
fprintf(stderr, "%s: warning -- missing %d%% of samples\n", |
340 |
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progname, (int)(100L*npixmiss/npixinvw)); |
341 |
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} |
342 |
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|
343 |
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|
344 |
< |
compdir(vd, x, y) /* compute direction for x,y */ |
345 |
< |
FVECT vd; |
346 |
< |
int x, y; |
344 |
> |
extern int |
345 |
> |
compdir( /* compute direction for x,y */ |
346 |
> |
FVECT vd, |
347 |
> |
int x, |
348 |
> |
int y |
349 |
> |
) |
350 |
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{ |
351 |
+ |
int hl; |
352 |
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FVECT org; /* dummy variable */ |
353 |
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|
354 |
< |
if (x <= -hlim) /* left region */ |
354 |
> |
hl = hlim(y); |
355 |
> |
if (x <= -hl) { /* left region */ |
356 |
> |
if (x <= -hl-sampdens) |
357 |
> |
return(-1); |
358 |
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return(viewray(org, vd, &leftview, |
359 |
< |
(x+hlim)/(2.*SAMPDENS)+.5, |
360 |
< |
y/(2.*SAMPDENS)+.5)); |
361 |
< |
if (x >= hlim) /* right region */ |
359 |
> |
(double)(x+hl)/(2*sampdens)+.5, |
360 |
> |
(double)y/(2*sampdens)+.5)); |
361 |
> |
} |
362 |
> |
if (x >= hl) { /* right region */ |
363 |
> |
if (x >= hl+sampdens) |
364 |
> |
return(-1); |
365 |
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return(viewray(org, vd, &rightview, |
366 |
< |
(x-hlim)/(2.*SAMPDENS)+.5, |
367 |
< |
y/(2.*SAMPDENS)+.5)); |
368 |
< |
/* central region */ |
369 |
< |
if (viewray(org, vd, &ourview, .5, y/(2.*SAMPDENS)+.5) < 0) |
366 |
> |
(double)(x-hl)/(2*sampdens)+.5, |
367 |
> |
(double)y/(2*sampdens)+.5)); |
368 |
> |
} |
369 |
> |
/* central region */ |
370 |
> |
if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
371 |
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return(-1); |
372 |
< |
spinvector(vd, vd, ourview.vup, h_theta(x)); |
372 |
> |
spinvector(vd, vd, ourview.vup, h_theta(x,y)); |
373 |
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return(0); |
374 |
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} |
375 |
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|
376 |
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|
377 |
< |
spinvector(vres, vorig, vnorm, theta) /* rotate vector around normal */ |
378 |
< |
FVECT vres, vorig, vnorm; |
379 |
< |
double theta; |
377 |
> |
extern double |
378 |
> |
pixsize( /* return the solid angle of pixel at (x,y) */ |
379 |
> |
int x, |
380 |
> |
int y |
381 |
> |
) |
382 |
|
{ |
383 |
< |
extern double sin(), cos(); |
384 |
< |
double sint, cost, dotp; |
385 |
< |
FVECT vperp; |
386 |
< |
register int i; |
387 |
< |
|
388 |
< |
sint = sin(theta); |
389 |
< |
cost = cos(theta); |
390 |
< |
dotp = DOT(vorig, vnorm); |
391 |
< |
fcross(vperp, vnorm, vorig); |
392 |
< |
for (i = 0; i < 3; i++) |
393 |
< |
vres[i] = vnorm[i]*dotp*(1.-cost) + |
394 |
< |
vorig[i]*cost + vperp[i]*sint; |
383 |
> |
register int hl, xo; |
384 |
> |
double disc; |
385 |
> |
|
386 |
> |
hl = hlim(y); |
387 |
> |
if (x < -hl) |
388 |
> |
xo = x+hl; |
389 |
> |
else if (x > hl) |
390 |
> |
xo = x-hl; |
391 |
> |
else |
392 |
> |
xo = 0; |
393 |
> |
disc = 1. - (double)((long)xo*xo + (long)y*y)/((long)sampdens*sampdens); |
394 |
> |
if (disc <= FTINY*FTINY) |
395 |
> |
return(0.); |
396 |
> |
return(1./(sampdens*sampdens*sqrt(disc))); |
397 |
|
} |
398 |
|
|
399 |
|
|
400 |
< |
memerr(s) /* malloc failure */ |
401 |
< |
char *s; |
400 |
> |
extern void |
401 |
> |
memerr( /* malloc failure */ |
402 |
> |
char *s |
403 |
> |
) |
404 |
|
{ |
405 |
< |
fprintf(stderr, "%s: out of memory for %s\n", s); |
405 |
> |
fprintf(stderr, "%s: out of memory for %s\n", progname, s); |
406 |
|
exit(1); |
407 |
|
} |
408 |
|
|
409 |
|
|
410 |
< |
printsources() /* print out glare sources */ |
410 |
> |
static void |
411 |
> |
printsources(void) /* print out glare sources */ |
412 |
|
{ |
413 |
|
register struct source *sp; |
414 |
|
|
421 |
|
} |
422 |
|
|
423 |
|
|
424 |
< |
printillum() /* print out indirect illuminances */ |
424 |
> |
static void |
425 |
> |
printillum(void) /* print out indirect illuminances */ |
426 |
|
{ |
427 |
|
register int i; |
428 |
|
|
429 |
|
printf("BEGIN indirect illuminance\n"); |
430 |
|
for (i = 0; i < nglardirs; i++) |
431 |
< |
printf("\t%f\t%f\n", (180.0/PI)*indirect[i].theta, |
432 |
< |
PI * indirect[i].sum / (double)indirect[i].n); |
431 |
> |
if (indirect[i].n > FTINY) |
432 |
> |
printf("\t%.0f\t%f\n", (180.0/PI)*indirect[i].theta, |
433 |
> |
PI * indirect[i].sum / indirect[i].n); |
434 |
|
printf("END indirect illuminance\n"); |
435 |
|
} |